Description
Electric central locking actuator for the left rear door of Citroën C3. Rear door behind the driver. 6 pins.
Product Overview
This electric lock actuator is a direct replacement for the left rear (driver’s side rear) door of Citroën C3 models equipped with a 6-pin connector. It operates the central locking mechanism to lock and unlock the door remotely or via the vehicle’s lock/unlock switches. Commonly referenced under part numbers 46978280 and 9137A1 (also shown as 9137.A1), this actuator is suitable for mechanics and DIYers who need a reliable spare part to restore proper door locking function. Keywords: Citroën C3 left rear door lock actuator, central locking actuator, 6-pin actuator, 46978280, 9137A1.
Technical Information
- Manufacturer: Stellantis / Citroën
- Model: Citroën C3 — Left Rear Door
- Product Codes: 46978280, 9137A1, 9137.A1
- Additional Numbers: NFP
Function
The actuator converts electrical signals from the central locking system into mechanical movement that engages or releases the door lock. It contains a small electric motor and internal gearing that drives the lock mechanism when receiving the lock/unlock command.
Reasons For Failure
Actuators typically fail due to mechanical wear of internal gears, broken plastic components, water ingress and corrosion, electrical connector oxidation, or motor burnout from repeated use. Freezing, impact damage to the door, and poor sealing of the door cavity accelerate degradation.
Installation Recommendations
Basic Replacement Steps: Disconnect the negative battery terminal or ensure ignition is off. Remove interior door trim and any moisture barrier as needed to access the lock assembly. Locate the actuator and disconnect the 6-pin electrical connector. Unfasten mounting screws or clips and detach linkage rods from the actuator. Install the new actuator by securing mounting points, reconnecting linkage rods and the 6-pin connector, then test lock/unlock operation before refitting the door trim. Reassemble in reverse order.
Recommended Tools And Tips: Use trim removal tools, suitable screwdrivers or driver bits, and a multimeter to verify power at the connector if diagnosing. Avoid forcing plastic clips—replace any damaged trim clips. Apply a small amount of appropriate lubricant to mechanical linkages after installation. Verify that the connector pins are clean and free of corrosion prior to assembly.
Notes For Mechanics And DIYers
Confirm that the vehicle uses a 6-pin connector and that one of the listed product codes matches the existing part before installation. Testing electrical supply at the connector and inspecting fuses and wiring can prevent unnecessary replacement if the issue is electrical upstream of the actuator. Replacement typically restores normal central locking operation quickly and is a common repair in bodywork and electrical maintenance.
Why Choose This Part
Direct-fit design and OEM-referenced numbers make this actuator a practical choice for efficient workshop repairs or self-maintenance. Including the correct product code in searches increases the chance of finding the exact item quickly and ensures a proper fit for the Citroën C3 left rear door application.
